1991-2020 Degrees Fahrenheit 1 86.5 91.2 -4.8 13 73 1965 2021 1942 1940 bottom-third 2 83.5 86.5 -3.0 26 59 1965 2006,2021,2022 1942 1940 bottom-third 3 80.1 81.9 -1.8 38 46 1965 2021 1942 1939 normal 4 76.5 77.9 -1.4 40 44 1965 2017 1942 1939 normal 1939,1946 5 73.2 74.3 -1.1 49 35 1965 2017 1942 1934 normal 1959,2005 6 70.1 71.3 -1.2 44 39 1944 2014 1942 1934 normal 7 68.2 69.0 -0.8 50 33 1944 2018 1942 1934 normal 8 67.7 68.5 -0.8 53 29 1944,1965 2018 1942 1934 normal 2011 9 68.3 69.5 -1.2 47 34 1944 2018 1942 1934 normal 1994,1999 10 70.1 71.4 -1.3 44 37 1942 2018 1942 1934 normal 1963,1994 11 71.9 73.4 -1.5 38 43 1942 2018 1942 1934 normal 1954,1968 12 73.8 75.2 -1.4 43 38 1942 2021 1942 1934 normal 1968 18 71.3 73.9 -2.6 20 59 1965 2018 1942 1943 bottom-third 1974,1977,1979 24 72.1 75.2 -3.1 3 74 1942,1965 2018 1942 1943 bottom-tenth 1966,1976 36 72.3 75.2 -2.9 6 69 1944 2018,2022 1943 1943 bottom-tenth 1967 48 -99 75.2 -99 -99 -99 1944 2018 normal 60 -99 75.1 -99 -99 -99 1975 2018 normal